name: linux builds

on:
  push:
    branches:
    - develop
    - releases/**
  pull_request:
    branches:
    - develop
    - releases/**
    paths-ignore:
      # Don't run if we only modified packages in the built-in repository
      - 'var/spack/repos/builtin/**'
      - '!var/spack/repos/builtin/packages/lz4/**'
      - '!var/spack/repos/builtin/packages/mpich/**'
      - '!var/spack/repos/builtin/packages/tut/**'
      - '!var/spack/repos/builtin/packages/py-setuptools/**'
      - '!var/spack/repos/builtin/packages/openjpeg/**'
      - '!var/spack/repos/builtin/packages/r-rcpp/**'
      # Don't run if we only modified documentation
      - 'lib/spack/docs/**'

jobs:
  build:

    runs-on: ubuntu-latest
    strategy:
      max-parallel: 4
      matrix:
        package: [lz4, mpich, tut, py-setuptools, openjpeg, r-rcpp]
    steps:
    - uses: actions/checkout@v2
    - name: Cache ccache's store
      uses: actions/cache@v1
      with:
        path: ~/.ccache
        key: ccache-build-${{ matrix.package }}
        restore-keys: |
          ccache-build-${{ matrix.package }}
    - name: Setup Python
      uses: actions/setup-python@v1
      with:
        python-version: 3.8
    - name: Install System Packages
      run: |
        sudo apt-get update
        sudo apt-get -yqq install ccache gfortran perl perl-base r-base r-base-core r-base-dev findutils openssl libssl-dev libpciaccess-dev
        R --version
        perl --version
    - name: Copy Configuration
      run: |
        ccache -M 300M && ccache -z
        # Set up external deps for build tests, b/c they take too long to compile
        cp share/spack/qa/configuration/*.yaml etc/spack/
    - name: Run the build test
      run: |
        . share/spack/setup-env.sh
        SPEC=${{ matrix.package }} share/spack/qa/run-build-tests
        ccache -s